Интерактивная система просмотра системных руководств (man-ов)
signbit (3)
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BSD mandoc
NAME
signbit
- determine whether a floating-point number's sign is negative
LIBRARY
Lb libm
SYNOPSIS
#include <math.h>
int
signbit (real-floating x);
DESCRIPTION
The
signbit ();
macro takes an argument of
Fa x
and returns non-zero if the value of its sign is negative, otherwise 0.
SEE ALSO
fpclassify(3),
math(3)
STANDARDS
The
signbit ();
macro conforms to
St -isoC-99 .
HISTORY
The
signbit ();
macro was added in
Fx 5.1 .
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- SEE ALSO
-
- STANDARDS
-
- HISTORY
-
